Baryon Chiral Perturbation Theory in the 1/N Expansion

Details Baryon Chiral Perturbation Theory in the 1/N Expansion Baryon Chiral Perturbation Theory in the 1/N Expansion

2002-01-25

arxiv.org/abs/hep-ph/0201246v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, Invited talk, The Phenomenology of Large-N_c QCD, to be published Proceedings of the Institute of Nuclear Theory

Scientific paper

The chiral Lagrangian for baryons is formulated in an expansion in 1/N_c. The chiral Lagrangian implements the contracted spin-flavor symmetry of large-N_c baryons as well as nonet symmetry of the leading planar diagrams. Large-N_c consistency conditions ensure that chiral loop corrections are suppressed in 1/N_c through exact cancellation of chiral loop graphs to fixed orders in 1/N_c. Application of 1/N_c baryon chiral perturbation theory to the flavor-27 baryon mass splittings and the baryon axial vector currents are considered as examples.

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